Should work but if you have larger active fish or fish that like to transport gravel from one area to the next dont be suprised when its all messed up...are you planning different colors at the two levels? If so get used to picking out pieces on a daily basis. I put some gravel in a plastic container in my tank (Was removing the gravel and just to be safe put some back it to keep a little BB) and the container had over an inch of empty lip. The fish still managed to scatter it all over the tank.